Means for forming recesses in sand molds



A. C. MOTT, .|R., AND L. KINSLEY. MEANS FOR FORMING RECESSES IN SAND MOLDS.

APPLICATION FILED OCT- 14, I918.

Patented Jan. 20, 1920.

2 SHEETS-SHEET I.

fiwenfors,

A. C. MOTT, 1a., AND L. KINSLEY. MEANS FOR FORMING RECESSES IN SAND MOLDS.

APPLICATION FILED OCT. I4, I918. 1,328,582.

Patented Jan. 20,1920.

2 SHEETSSHEET 2.

V//// wr UNITED srA'r s PATENT OFFICE.

ABRAM o. MOTT, an. Annnnwrs, KINSLEY, or P IL DE PHIA, PENNSYLVANIA, essrenons TOIABRAM cox s'rovn COMPANY, O 'PHIL'ADELPHIA, BENN'SYL- VANIA, A CORPORATION or PENNSYLVANIA.

FOR FORMING RECESSES IN SAND MOLIJS.

Specification of Letters Patent.

Patented Jan. 20, 1920.

Application filed October 14, 1918. Serial No. 257,974.

To all whom it may concem Be itknown that we, ABRAM C. Mo'rT, J r., and LEWIS KINsLEY, citizens of the United States, and residents of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain Improvements in Means for Forming Recesses in Sand Molds, of which the following is a specification.

One object of our invention is to improve the construction of patterns used in making shells and other articles. where a recess is formed in the walls of a mold cavity.

A further object of the invention is to design the, mechanism of the pattern so that a single ring, or. segment of a ring, or slides, can be projected into the sand of the mold after the sand has been rammed.

A still further object of the invention is to provide a templet for controlling the movement of the means for projecting the segments when it is desired to make recesses at given points.

In the accompanying drawings L Figure 1, is a vertical sectional view of our improved pattern within a mold;

Fig. 2, is a view of the pattern within the mold, showing the ring projected to form the recess in the mold cavity;

Fig. 3, is a sectional View on the line3 8, F ig. l;

F ig, 4, is a. sectional view of the mold showing the completed mold cavity in which a shell is cast;

Fig. 5, is a View, similar to a portion of Fig. 2, showing the ring held in the central position so as to allow it to be withdrawn without injuring the walls of the mold cavity;

Fig; 6, is a plan View of a modification illustrating a series of segments; and

Fig. 7, is a plan view of a templet for controlling the projection of the segments.

1 is a pattern, in the present instance of the shell of a projectile. The pattern has a body section 2 and a point section 3 screwed onto the body section as clearly shown. 4 is the base of the body section, which is shaped as shown for the purpose of forming a stepped cavity for the reception of the base of a core, which is inserted in the moldcavity before the casting is made. This pattern 1 is mounted on a pattern board or plate 5, which is clamped to the flask in any suitable manner. The pattern has an annular projection 7 which forms the recess for a collar at one end of the shell. A ring 8. near the point end of the shell forms the recess for the other collar. This ring 8 is mounted in an annular groove 9 formed in the body portion 2. The point section 3 forms the top of the groove. WVhen it is desired to remove the ring the point section 3 can be unscrewed and the ring can be re moved and replaced, if desired.

The ring 8 isprojected into the sand mold, as shown in Fig. 2, by operating the rod 10, which has a ball 11 at the upper end adapted to a socket 12in anextension 13 of the body section 2. The walls of this socket above the base are parallel so that the ball can be raised when it is desired to bring the ring 8 to its central position. On the rod 10 is a sleeve 14 having a hub 15 and a beveled flange 16 and the opening in the upper end of the body section is tapered. The tapered flange fits this tapered portion when it is desired to center the ring, as in Fig. 5.

A series of rods 17, eight in the present instance, are adapted to radial passages in the portion 18 of the body portion 2 and the outer ends of these rods bear against the ring 8 while the inner ends of the rods bear against the hub 15 of the sleeve 14.

In order to project, the ring so as to make the annular groove 00, Fig. 2, in the walls of the mold cavity y, Fig. 4, the lower end of the rod 10 is given a rotary motion, which forces the. ring beyond the surface of the body portion, as shown in Fig. 2, through the rods 17 causing the ring to press against the sand of the mold and make the recess to the depth required. This ring must be brought to a central position so that its outer surface will be flush with the outer walls of the body portion, in order to allow the pattern to be withdrawn from the mold. While the ring may be set by bringing the rod to a central position, we insure the centering of the ring by forcing the rod up so as to allow the flange 16 of the sleeve 14 to fit in the conical opening in the body portion, as shown in Fig. 5. This centers the rod and also centers the ring after which the pattern can be withdrawn, leaving the mold cavity y having an annular recess m near the point end of the projectile, a recess 2 in the opposite end, and an annular seat cavity to for the core base. Any suitable core with a removable.

base can be used, which insures the centering of the body of the core in the mold cavity.

While the invention is particularly adapted for making annular cavities in the mold, in some instances these cavities may be segmental or merely isolated recesses. IIn

' some cases, instead of making the ring in a single piece, as shown in Figs. 1 and 3, the ring may be made in sections 8 and as the rod 10 is rotated one section after an other will be projected to form the recess, and where it is desired to make an isolated or other form of recess we may make some of the segments fixed while the others are The rods 17 of the fixed segments are then dispensed with. In some instances, where it is desirable to place the projections at given points, we may use a templet 19, Fig. 7, having a central opening with notches 20 therein for the rod 10 so that the rod can be moved into one notch after another, this causes the ring, or other slides, to be projected into the walls of the sand mold.

It will thus be seen from the above description that we can make an annular groove in the pattern, or can make isolated projections at given points.

While we have described the invention as particularly adapted for making the annular recesses in the walls of the mold cavity for the casings of shells or projectiles, it

will be understood that the invention can be used for preparing the mold for eastings, or other articles, as well.

We claim 1. The combination in a pattern, of a body portion; a device for forming recesses in the walls of a mold; a pivoted rod; and means connecting the rod with the device so that when the free end of the rod is moved in a circular path out of the center the device will be projected beyond the walls of the pattern.

2. The combination in a pattern, of a body portion having a recess therein; a

ring mounted in the recess and of the same I diameter as the body portion of the pattern; a central rod pivoted to the pattern;

and means connecting the rod with the ring so that when the free end of the rod is moved out of center and in a circular path, the ring will be projected beyond the body portion.

3. The combination of a body portion having an annular recess therein; a ring mounted in the body portion; a central socket in the body portion; a rod having a ball at one end adapted to the socket, said body portion having radial passages; and rods mounted in the radial passages bearing against the ring so that when the rod is moved out of the center the ring will be projected beyond the walls of the pattern.

4-. The combination of a pattern having a recess therein; a ring mounted in the recess, said pattern having a series of radial passages; a rod mounted in each passage; a pivoted rod extending throughout the length of the pattern and having a sleeve thereon with a hub and a flange; and a pattern having a conical opening into which the sleeve extends, the parts being so arranged that when it is desired to center the rod with its sleeve, it is moved longitudinally so as to bring the flange of the sleeve into the conical opening and thus center the ring.

5. The combination of a pattern; a body portion having an enlarged extension; a point section and threaded opening adapted to be secured to the threaded extension of the body; a recess at the junction of the two sections; a ring mounted in the recess, said body portion having a central socket therein and having a tapered opening below the socket; a rod having a ball mounted in the socket and having a flanged sleeve secured thereto, the body portion having a series of radial passages; and a rod in each passage by which motion given to the rod can be imparted to the ring.

In witness whereof we afiix our signatures.

ABRAM o. MOTT, JR. LEWIS KINSLEY. 

